Question

Which among the following, is the correct expression for force in a current carrying conductor if magnetic field is perpendicular to it?

(a) F=Bi

(b) F=B^2il

(c) F=Bil

(d) F=Bl^2

I had been asked this question in final exam.

The above asked question is from Force Determination in portion Electromagnetism of Basic Electrical Engineering

Answer 1

Correct choice is (c) F=Bil

To elaborate: The correct expression for force in a current carrying conductor in a magnetic field perpendicular to it is F=Bil, where B is the magnetic field, i is the current in the conductor and l is the length of the conductor.